this is not an appropriate addition to the season three page. That section is meant for valid, overarching plot information, in short bullet points. What you added is a literal excerpt from ABC's updated show synopsis, and is therefore not appropriate for the article. It's not giving us any information we don't already know, and the synopsis is already present on the Once Upon a Time page.

No one remembers how they were transported back or the past year they had spent back in Fairy Tale Land. But someone in town is responsible for this curse, and all clues point to the Wicked Witch of the West, whose agenda in our world is a mystery. In an attempt to break the curse, new fairytale characters will be revealed and old acquaintances will be revisited. But not everyone can be trusted